null created by oliverjam - https://repl.it/InIk/0

JavaScript-Pi-Calculator.js

function calculatePi(dp = 200000) {
  let pi = 3;
  let i = 2;
  while (i < dp) {
    const divisor = 4 / (i * (i + 1) * (i + 2));
    if (i % 4 === 0) {
      pi -= divisor;
    } else {
      pi += divisor;
      console.log(i + ' ' + pi);
    }
    i += 2;
  }
  return pi;
}

calculatePi();